Cutting tool insert



FIG. 1 is a perspective view of a cutting tool showing my new design;

FIG. 2 is a right side elevational view, the left side elevational view being identical thereto;

FIG. 3 is a rear end elevational view thereof;

FIG. 4 is a front end elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof.

The left side view, which is not shown, is similar to the right side view shown in FIG. 2. 

The ornamental design for a cutting tool insert, substantially as shown and described. 